The main focus of this study is to utilize the laser Doppler velocimetry (LDV) technique to measure the velocity of the particles which are emerging out from the propellant burning surface in the gas-phase zone under steady state to determine the mean burning rate of aluminized solid propellant and double-base propellant in the pressure range of 1–5 MPa. The steady-state experiments are conducted under the high mean chamber pressure with incorporation of servo-mechanism feedback system to maintain the relative distance between the laser probe volume and the propellant regression surface. It is clear from the literature that only limited work has been reported on LDV of solid propellants and there is hardly any work reported on characterizing aluminized solid propellants at high mean chamber pressure using the LDV technique, which has high spatial and temporal resolution features. A high-pressure window bomb with multiple optical access and coupled with a feedback actuation system serves the purpose of visualizing the propellant burning with the help of a camera and allows the laser beam to align over the propellant surface. The actuation system is operated under two modes, viz., open-loop and closed-loop mechanism. The combustion photography is performed up to the mean chamber pressure of 5 MPa to compare the data with that of the LDV. It can be concluded that the LDV of solid propellant has shown promising result for the aluminized propellant and double-base propellant burning rate estimation under steady-state combustion for high mean chamber pressure. © 2022 by Begell House, Inc.